Sean Marshall vs. David Williams — Career Comparison

David Williams built a career as a starting pitcher and Sean Marshall as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Sean Marshall led in walk avoidance (BB%+ 113 vs 85), skill-based run prevention (DICE+ 109 vs 86), and home run suppression (HR9+ 114 vs 91). David Williams held the edge in run prevention (ERA+ 108 vs 107). Role difference aside, Sean Marshall holds a clear edge on every meaningful shared measure.